When Khrushchev demanded that US troops leave West Berlin, Kennedy responded by O calling up additional troops.
O building the Berlin Wall.
O withdrawing troops from the city
O launching the Bay of Pigs invasion.

by calling up additional troops

:)

Explanation:

Sorry if I am wrong

according to romans 13: 1-7, 1st peter 2: 12-14, and 1 timothy 2: 1-4, christians as citizens have specific responsibilities to a nation that gives liberties to its people. christians are obliged to live as good citizens by submitting to the human government. honor, or respect, is due to men in the high governmental station. a christian should reflect such respect not to gain some favor but because it is god’s will. peter 2: 14 notes that the purpose of the human government is to promote peace and justice in society. to submit to human government, peter includes three elements; obedience, respect, and good deeds.

d.

the northwest territory became the most densely populated area in the u.s.